feat: 完成 B 群組 — 資料層與核心領域模型

- 導入 Prisma 7.9.1 + SQLite（better-sqlite3 driver adapter），prisma.config.ts 管理連線設定
- 完整資料模型：User／Work／Character／CharacterAlias／EpisodicMemory／SemanticMemory／
  ProceduralRule／EmotionState／Relationship／SentimentLedgerEntry
- packages/db：Prisma Client 存取層（ESM，因 Prisma 7 產出的 generated client 僅支援 ESM）
- apps/api 隨之改為 ESM 以相容 packages/db
- packages/shared：新增角色／記憶／情緒／關係共用型別，api 與 web 皆從此匯入
- prisma/seed.ts：建立測試使用者與元氣型測試角色，含完整關係帳本與記憶種子資料
- apps/api：新增 GET /characters
- scripts/smoke/B.mjs：驗證資料表齊全、API 讀出種子角色、關係與記憶可寫入讀出
- 保留 Prisma 官方隨 CLI 附的 agent skill 文件（.agents/skills 等），供後續群組查閱

npm run restart && npm run smoke -- B 皆通過（B-V），A 群組冒煙測試無回歸。

.agents/skills/prisma-cli/references/mcp.md

@@ -0,0 +1,39 @@
+# prisma mcp
+
+Starts Prisma's MCP server for AI development tools.
+
+## Command
+
+```bash
+prisma mcp
+```
+
+## What It Does
+
+- Starts a Model Context Protocol (MCP) server for your Prisma project
+- Exposes Prisma schema and database context to compatible AI tools
+- Helps AI assistants understand models, generate queries, and suggest migrations
+
+## Usage
+
+```bash
+prisma mcp
+```
+
+## Typical Use Cases
+
+- Connect Prisma to ChatGPT, Claude, or other MCP-aware tools
+- Give an AI assistant access to your Prisma schema structure
+- Help an agent propose queries, schema updates, and migration steps with project context
+
+## Notes
+
+- Run this from the project that contains your Prisma schema and `prisma.config.ts`
+- The command is separate from Prisma Studio and does not open a browser UI
+- The MCP server exposes `migrate-status`, `migrate-dev`, and Prisma Studio tooling. It does not expose the destructive `migrate-reset` tool; do not claim it is available or try to bypass that safety boundary.
+- For destructive shell commands, follow `agent-safety.md` and obtain explicit user consent.
+
+## References
+
+- [Prisma CLI `mcp` command](https://docs.prisma.io/docs/cli/mcp)
+- [Prisma MCP Server](https://www.prisma.io/docs/ai/tools/chatgpt)